Basically, what you can see are zoomed one-cell layers of petales. Common to every picture, are the purple cells. The pigments are in the cell's vacuole, which is also turgid, meaning that this was a healthy plant, as vacuoles fill with water as they are filled with minerals and pigments, through osmosis. In the most zoomed pictures you can see the floemic tubes that carry the organic molecules derived from photosynthesis, like glycose. If there is anything else you wish to know, just ask. :)